[arch-dev-public] Killing [unstable] for good

[Dan McGee]

Any qualms about killing [unstable] from our FTP completely? We still
have the directories and the "empty" databases sitting around. I think
we've given plenty of warning to people that unstable no longer
exists.

At the very least, I'd rather have empty directories than the leftover
databases we have there now that are sometimes breaking pacman because
of the lone ./ entry inside of them.

-Dan